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The 6 numbers of 123456 can be used to form a 4-digit number Shi that is not repeated and 5,6 are not adjacent to each other
12 order: 1. The first one is odd: 12 has 3 positions, so it is 3 * 2 * 2 = 122. The first one is even: the first one chooses from other 2 even numbers, 12 has 2 positions. So it is 2 * 2 * 2 = 821 order, as above: 1. The first one is odd: the first one chooses from other 2 even numbers, 12 has 2 positions. So it is 2 * 2 * 2 = 82.12, so it is 3 * 2
RELATED INFORMATIONS
- 1. Let 3 to the power of a = 4 to the power of B = 36, can we get the result of 2 / A + 1 / b? If so, what is it?
- 2. If there are two unequal real roots of equation (1 / 2) ^ (absolute value (x-1)) = m, find the value range of M
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- 7. 2 / x + 5 = 1 / 3x to solve the equation
- 8. Solution equation: (8x-50) / 3 - (10x + 40) / 5 = 10
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- 13. If the solution of equation 6 (1-x) - 3 (x + m) = 4 (2x-1) about X is nonnegative, find the range of M
- 14. Given that real numbers a and B satisfy (a + b) power + A + B-2 = 0, find the value of a + B
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- 18. If the solution of the equation 2x = 4 is such that (A-1) x is a linear inequality of one variable with respect to X
- 19. What is the number of even six digit numbers composed of 123456, which have no duplicate numbers and 13 is not adjacent to 5
- 20. 9.8x-9.6x = 5.4